With the ladle gently spread the batter to get a neat round shape and a thin dosa. if the pan is very hot, you won’t be able to spread the batter in a round circle. So for a non-stick pan, just lift the pan from the flame and keep outside for some seconds or half a minute. then again place it on the fire. for an iron griddle, you can sprinkle some water on the pan. This reduces the temperature of the cast iron griddle. please do not sprinkle water on non-stick pan. The non-stick coating can wear off.